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Rao" , Michael Ellerman , linux-trace-kernel@vger.kernel.org, Mark Rutland , Steven Rostedt , Masami Hiramatsu , llvm@lists.linux.dev, Maryam Moghadas Subject: [PATCH v2 0/3] powerpc64/ftrace: fixes clang build issues Date: Tue, 27 Jan 2026 14:19:23 +0530 Message-ID: <20260127084926.34497-1-hbathini@linux.ibm.com> X-Mailer: git-send-email 2.52.0 X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 5DNcWl8SVAQjCoESUTSqNUI4HKfB6L_R X-Authority-Analysis: v=2.4 cv=Uptu9uwB c=1 sm=1 tr=0 ts=69787c1e cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=vUbySO9Y5rIA:10 a=VkNPw1HP01LnGYTKEx00:22 a=NEAV23lmAAAA:8 a=Sn1wcNZhM9ubr6L8njsA:9 X-Proofpoint-ORIG-GUID: 5DNcWl8SVAQjCoESUTSqNUI4HKfB6L_R X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTI3MDA3MSBTYWx0ZWRfXzl9dakQzjrqs c/5R05DFmgKQp3Fku95FmHhxzNG/19NnZv4rN4H+DgzEVCUWGXA6ZdtLKMX7FlDpyXbfkDmEJKg OLponKC4//3jiYz9hm8qeCi+GacK3O2nTZ64g0tdUIpnVOn5y9/R4RVb0CApOic1bfdvENpyx0O dOM6QhrcSxdsSVSk3jORJoX00r1SjumcCP3VZKP4pglOTvQN4uyQr0pDENXBoxYkXAi17LN60zj nhgnu4qDnc6V5U6Wnqdmh/Jt3eI7RW26TsJ2LqDFVaxVMMFucnOFpjGK2+ePEI6zhfsiwZwrckw bGk+EnW7M4yglVDU3QY8FQDObjiEKq8gQfUPZQ/5xI3fyoqXAsk4tjfHK1F61+9ohyCgW1aAD0j TAXwrLi6vRl4kTmv5XRZ9Vt4TqmHHCci5lzulxg6wZTXscm9t4zcyYWWfGaTDAitkOSMNan5x7S af8opU2l2FlT8RC6nlQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.20,FMLib:17.12.100.49 definitions=2026-01-27_01,2026-01-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 priorityscore=1501 clxscore=1015 lowpriorityscore=0 phishscore=0 adultscore=0 impostorscore=0 bulkscore=0 spamscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2601150000 definitions=main-2601270071 Support for -fpatchable-function-entry on ppc64le was added in Clang with [1]. Faced a couple of issues while building the linux kernel with Clang though. Patches 1 & 2 address those issues. The last patch provides workaround to ensure, an open issue [2] in Clang with -fpatchable-function-entry support, does not impact the linux ftrace subsystem. [1] https://github.com/llvm/llvm-project/pull/151569 [2] https://github.com/llvm/llvm-project/issues/163706 Hari Bathini (3): powerpc64: make clang cross-build friendly powerpc64/ftrace: fix OOL stub count with clang powerpc64/ftrace: workaround clang recording GEP in __patchable_function_entries arch/powerpc/Kconfig | 4 +-- arch/powerpc/kernel/trace/ftrace.c | 26 ++++++++++++++++--- ....sh => check-fpatchable-function-entry.sh} | 0 arch/powerpc/tools/ftrace-gen-ool-stubs.sh | 4 +-- 4 files changed, 26 insertions(+), 8 deletions(-) rename arch/powerpc/tools/{gcc-check-fpatchable-function-entry.sh => check-fpatchable-function-entry.sh} (100%) -- 2.52.0